GMail Powershell Issue with Dates Using GMail.PS Module

I'm using the GMail.PS Module found here and can't get it to properly filter emails with the -after or -on switch.  I tried this on Powershell 2 and Powershell 4 on Windows Server 2008 and Windows 7 using different PCs.

This is a sample code:

$EmailUser = 'Test@GMail.Com'
$EmailUser2 = 'Test@Test.Com'
$EmailSubject = "isAlive"
$pw = [System.Convert]::FromBase64String("Base64Password")
$pw = [System.Text.Encoding]::UTF8.GetString($pw)


$secpasswd = ConvertTo-SecureString $pw -AsPlainText -Force
$mycreds = New-Object System.Management.Automation.PSCredential ($EmailUser, $secpasswd)
$gmail = New-GmailSession -Credential $mycreds

$inbox = $gmail | Get-Mailbox
$inbox | Get-Message -Before "2014-11-30" ## This works fine.
$inbox | Get-Message -After "2014-11-30"  ## This does not work.

I looked through the module and saw that the -after command is using

    if ($On) {
        $imap += 'ON "' + $(GetRFC2060Date $After) + '"'

    if ($After) {
        $imap += 'AFTER "' + $(GetRFC2060Date $After) + '"'

    if ($Before) {
        $imap += 'BEFORE "' + $(GetRFC2060Date $Before) + '"'

As we can see they are identical here.

and function GetRFC2060Date is:

function GetRFC2060Date([DateTime]$date) {
    $date.ToString("dd-MMM-yyyy hh:mm:ss zz", [CultureInfo]::GetCultureInfo("en-US"))

Which doesn't really give me any info as to why it's not working.

Using -After gives us this error:

Using -On gives us this error which gives us more info and points to the GetRFC2060Date function.

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